EP1818963A1 - Fuse rail with lateral outlet contacts - Google Patents

Abstract

The fuse rail has a terminal block (10,11,12) per pin on a side of the housing (1) in each case. An outlet contact is contained in each terminal block for screw less attaching of outgoing feeder. Each outlet contact is provided over the respective fuse element of an electric circuit to the associated contact element for contacting of a bus bar. Each terminal block has a guidance (18,19,20) for inserting outgoing feeder.

Description

The invention relates to a fuse strip having the features of the preamble of patent claim 1.

A fuse bar is for example from the DE 100 54 168 known. Such fuse strips are preferably designed as two or three poles and are clamped on a group of two or three busbars. Such fuse bars contain per conductor a fuse unit, which lies between the relevant conductor of the busbar group on the one hand and a subsequent device in the circuit. Typically, such fuse strips are provided with terminals, which are preferably formed in an end region of the strip and serve to connect wiring to the respective switching device. In such fuse strips located in the region of a clamping foot, a contact element which contacts the associated busbar. This contact element is connected via conductors to one side of the associated fuse element, while the other side of the fuse element is electrically connected to a screw terminal to which a conductor of the relevant switching device or the like can be connected.

The invention has the object of providing a fuse strip of the type mentioned in such a way that the outgoing contacts allow a direct and preferably screwless connection of outgoing lines.

This object is achieved by the features specified in claim 1.

Further embodiments of the invention will become apparent from the dependent claims.

The invention provides a fuse strip, in particular a bridge-shaped fuse strip for direct plugging on a busbar system, in which the outgoing contacts are each formed laterally of the fuse strip. This allows a direct connection of outgoing lines to the side outlet contacts.
A significant advantage of the fuse strip according to the invention is that the need for known fuse strips within the housing paths to the end terminals omitted, ie the fuse strip total may have a pleasing and shorter shape and in consequence of insulating ribs necessary in the longitudinal direction of the bar running effort to isolate the mutually adjacent conductor guides deleted.

According to a preferred embodiment, the side outgoing contacts are equipped with clamping springs, whereby a screwless connection of the outgoing lines is made possible, d. H. The outgoing cables need only be plugged into the respective openings for connection to the fuse strip and are locked automatically. To release the outgoing lines, an additional opening is provided, by means of a tool, the latching between the outgoing contact and outgoing line can be canceled.

According to the present invention, all functionally relevant parts of a pole in the respective pole section, i. H. housed within the fuse strip in the region of the respective terminal block 10 or 11 or 12, namely the fuse holder, the incoming and outgoing contacts and the respective outgoing terminal, preferably in the form of a screwless spring clip. Each of these pole sections thus forms a subarea in the form of a functional unit. In this way, the fuse strips can be designed as a bipolar and four-pole embodiments in combination of two such fuse strips.

In the fuse strip according to the invention are provided for each outgoing contact side of the bar provided terminal blocks containing the outgoing contacts in an easily accessible manner. In a preferred embodiment, vertically extending, ie perpendicular to the longitudinal axis openings for inserting the outgoing lines are provided in the laterally shaped terminal blocks per outflow contact and preferably each an opening also in a vertical orientation for introducing a Tool, such as screwdriver for releasing the connection between the output contact and output line.

The fuse strip is bipolar, but also multi-pole executable.

Fig. 1

eine Perspektivansicht der erfindungsgemäßen Sicherungsleiste von der Seite mit den Anschlussblöcken,

Fig. 2

eine Ansicht der Sicherungsleiste gemäß Fig. 1 bei gegenüber Fig. 1 um 180° gedrehter Sicherungsleiste,

Fig. 3

eine Perspektivansicht der Sicherungsleiste von unten entsprechend Fig. 1,

Fig. 4

eine Darstellung der Sicherungsleiste entsprechend Fig. 2 mit entfernten Seitenwänden zur Darstellung der Kontaktführung,

Fig. 5

eine Perspektivansicht zur Darstellung des Abgangkontaktes zusammen mit dem zugehörigen Kontaktelement und

Fig. 6

eine schematische Darstellung von zwei zweipoligen Sicherungsleisten

In the following, a preferred embodiment will be described with reference to the drawings to explain further features. Show it:

Fig. 1

a perspective view of the fuse strip according to the invention from the side with the terminal blocks,

Fig. 2

1 at 180 ° rotated with respect to FIG. 1 fuse strip,

Fig. 3

a perspective view of the fuse strip from below corresponding to FIG. 1,

Fig. 4

2 shows an illustration of the fuse strip according to FIG. 2 with the sidewalls removed to show the contact guidance;

Fig. 5

a perspective view illustrating the outgoing contact together with the associated contact element and

Fig. 6

a schematic representation of two bipolar fuse strips

Fig. 1 shows a three-pole fuse strip, which consists of a housing 1, preferably made of plastic. The housing may be divided into an upper housing part and a lower housing part, which is not shown in Fig. 1 further. Within the housing 1 are in the three-pole fuse strip shown in Fig. 1, three levers 2, 3, 4, by the actuation thereof within the housing rotatably mounted securing receptacles are adjustable so that the existing backup in the recordings fuses can be removed or inserted. On the underside of the fuse strip are each a clamping foot 6, 7, 8, which is pushed onto a respective busbar, not shown. This principle is known per se.

Side of the fuse strip connection blocks 10, 11, 12 are provided, which receive the respective clamping foot 6, 7, 8 partially integrated, wherein the terminal blocks 10, 11, 12 in the longitudinal direction of the fuse strip spaced from each other or are separated. Each terminal block 10, 11, 12 has a recess 14, 15, 16, such that the respective Klemmfußbereich arranged therein can be displaced over the respective busbar.

Within each terminal block 10, 11, 12 is at least one preferably cylindrical opening or guide 18, 19, 20 is formed, which serves to a discharge line preferably displaced vertically downwards and can be inserted into a Kontaktanordndung to be described. In addition to the opening or guide 18, 19, 20 is per connection block 10, 11, 12 each have a further preferably slot-shaped opening or guide 22, 23, 24, which serves a once established connection between the contact assembly and the outlet line in case of need a tool to solve.

Fig. 2 shows a view of the fuse strip corresponding to FIG. 1 from the direction of the arrow in Fig. 1 designated by 25 and shows the clamping feet 6, 7, 8 and a cover plate 26 which z. B. by ratchet teeth 27, 28, 29 is fixed, which engage in a corresponding opening 31, 32, 33, which are each formed in the plate or wall 26.

Fig. 3 shows a view of the fuse strip from below as shown in FIG. 1 and illustrates contact elements 35, 36, 37, which are inserted above the clamping feet 6, 7, 8 in the housing to after placing the fuse strip on the relevant Busbars make electrical contact with the busbars.

From the above description it is apparent that at the bottom of the housing 1 contact elements 35, 36, 37 are formed above the clamping feet 6, 7, 8, to contact the busbars. The contact elements 35, 36, 37 are connected via a contact path with one end of the fuse elements inserted into the housing 1, while the other side of the fuse elements is guided via a contact path to a contact arrangement, which is located within the lateral terminal blocks 10, 11, 12 , as explained in more detail below.

Fig. 4 shows a side view of the fuse strip according to Fig. 2, wherein the wall or plate 26 is removed and thus the contact guide within the housing 1 can be seen. Two of the three busbars are indicated in the three-pole fuse strip according to Fig. 4 by the reference numerals 38, 39. The contact elements 35, 36, 37 are biased by springs 41, 42, 43 in the direction of the respective busbars 38, 39 in order to ensure a good electrical contact between the contact elements 35 to 37 and the associated busbars 38, 39. With regard to the contact element 37, the circuit runs from the contact element 37 via a contact section 45 to a contact 46, which consists of two substantially parallel, mutually mirror-symmetrical contact tongues 46a, as will be explained in more detail below. The contact tongues 46a engage around an end of a securing element 48, the z. B. is provided with a cylindrical conductive element, whereby one side of the fuse element 48 and a fuse is electrically contacted. The other end of the fuse or fuse element 48 likewise has, for example, a cylindrically shaped conductor section which is in electrical connection with a further contact 50, wherein the contact 50 corresponding to the contact 46 has two substantially mutually mirror-symmetrical contact tongues 50a, which the Contact the conductive end of the fuse element 48. From the contact 50 of the circuit via a contact portion 52 to the laterally disposed outgoing contact 53rd

Details of the inclusion of the fuse elements 48 are not further explained, since they are not the subject of the present invention.

From Fig. 4 it can be seen that the contacts 46, 48 inserted from the recognizable from Fig. 4 side into the housing in a simple manner or can be used. The contacts 46, 50 will be explained in more detail below. For receiving the contacts 46, 48 corresponding recesses are provided in the housing, which ensure that the contacts can be quickly and safely inserted from the side into these recesses and / or ribs or projections and remain slip-proof in the housing. After insertion of the contacts 46, 50, the open in Fig. 4 side of the housing is closed by the cover or plate 26, the plate 26 is locked in the manner described with respect to the housing or otherwise secured. The contacts 46, 50 are substantially identical and preferably identical to each other with respect to the contact tongues 46a, 50a.

From the above explanation it follows that the recesses 54 and 55 for receiving the contacts 46, 50 preferably correspond largely to the shape of the contacts 46, 50 in order to receive these contacts securely and immovably. For the contact portions 45, 52 corresponding guide slots or recesses may be provided in the housing. The contact portions 45, 52 are formed differently from each other. This will be described in more detail below with reference to section 52. In contrast, the section 45 merely represents a connecting section to the contact 37.

Compared to the figures 1 to 3 the same parts are provided in Fig. 4 with the same reference numerals and will not be explained again here.

In order to securely position and secure the fuse strip according to FIGS. 1 to 4 with respect to the associated busbars 38, a spring-loaded latching catch 57 is provided on the right-hand clamping foot 6 in FIG. 4, which is preferably provided with latching teeth through which Spring preload prestressed lever 57a, on the one hand to allow the use of the fuse strip on busbars of different dimensions and on the other hand to ensure a latching against the relevant, not shown in Fig. 4 busbar after placing the fuse strip.

Fig. 5 shows a perspective view of a contact 50, as it is preferably used in the embodiment of Fig. 4. Evidently, such a contact 50 is provided per pole and the circuits are defined per pole, as described above in connection with FIG. 4 with respect to the busbar 39. The same applies to the other circuits or the busbar 38 with the contact element 36 above the clamping foot 7 and the busbar 39 with the contact element 35 above the clamping foot. 6

The contact 50 according to FIG. 5 preferably consists of two contact tongues 50a, 50a 'lying essentially mirror-symmetrically to one another. These contact tongues 50a, 50a 'engage around the conductive end of the fuse 48. The two contact tongues 50a, 50a' are at a designated 50c, 50c 'section fixed by a cross bar 58 and preferably resiliently connected to each other.

In a preferred embodiment, the two contact tongues 50a, 50a 'each have on their outer side two mutually parallel locking cams 59, 60 which are provided to fix a U-shaped spring 62 encompassing the two contact tongues 50a, 50a'. 5, the contact tongue 50a 'in the form of a web 64 narrower in relation to the wall 50c extends beyond the transverse bow 58 downwards and together with a section 65 pointing away from the web 64 forms an approximately L-shaped contact. shaped extension. The portion 65 is provided with another 90 ° angled portion 66, the 90 ° angle between the portions 65 and 66 being set in one direction such that the portion 66 protrudes outwardly from the plane of the tongue 50a ', d. H. in a direction opposite to the tongue 50a (Figure 5). At the portion 66 is down from an extension 68, which has a smaller width than the portion 66, as is readily apparent from Fig. 5. Preferably, as compared to the contact 50 additional part, a spring 70 is provided, wherein the spring 70 may alternatively be formed as an integrated part of the contact 50.

In the illustrated embodiment, the spring 70 is provided separately from the contact 50, such that a leg 71 of the spring 70 is provided with a slot or approximately rectangular opening 72. The leg 71 is at an angle of about 90 °, preferably greater than 90 ° from a base 73 of the spring 70 from. At the base 73, a further leg 75 is provided after an approximately U-shaped transition section 74, which is slightly V-shaped according to FIG. 5 and carries at its end a spring tongue 76 which has a width which is slightly smaller than that Width of the slot 72 and which abuts against the contact portion 68 of this pivotally.

The contact 50 with the spring 70 is designed such that a stripped cable end, ie an outgoing line in FIG. 5 can be inserted from top to bottom while pivoting the spring tongue 76 in FIG. 5 counterclockwise between the section 68 and the spring tongue 76, ie a screwless connection of the outgoing cable is possible. After the introduction of the outgoing line in the area between section 68 and spring tongue 76 is due to the action of the spring tongue 76 which abuts obliquely opposite to the axis of the outlet line to the outlet line, not shown, a retraction of the Outgoing line from this engagement relationship prevented. In order to remove the outgoing line from this engagement relationship, by means of a tool, preferably a screwdriver, which is inserted through the slot-shaped opening 22 in Fig. 1 in the terminal block 10, 11 or 12, a release of the trapped outlet line is possible in that the Screwdriver on the leg 25 exerts pressure by the screwdriver end acts either on the spring tongue 26 or on the approximately V-shaped portion of the leg 75 and thus causes a displacement of the spring tongue 76 in the clockwise direction in Fig. 5 to release the outgoing line.

Evidently, the outgoing contacts, formed by the sections 65, 66, 75, 76, 68, in each case one of the terminal blocks 10, 11, 12, while the pole provided by contact 50 within the housing 1 in Fig. 1 side of a fuse element and is inserted from this downwardly extending into the housing 1. The contact 50 is therefore above the respective outgoing contact. With the contact 50 described with reference to FIG. 5 and the spring 70, d. H. the contact arrangement formed from the sections 50 and 70 is achieved in that the component 50 in electrical contact with the respective fuse is arranged approximately centrally within the upper housing part of the fuse strip, while the section in the form of the spring 70 together with the sections 65, 66 , 68 laterally outwardly offset to the contact 50, with the result that the associated outlet line laterally offset from the contact 50 in the outgoing contact in the form of sections 65, 66, 68, 76 can be inserted. The actual outgoing contact, formed by the sections 65, 66, 68, 73, 74, 76 is thus located in a plane which is offset parallel and laterally outwards to the level of the respective fuse. The outgoing contact is by this construction laterally in the terminal blocks 10, 11, 12, that is offset outwardly relative to the housing 1, arranged. The lateral design of the guides 18, 19, 20 to the outgoing contacts with clamping spring 70 is inventively possible in that the spring contact 70 is provided laterally offset relative to the located in the housing 1 and in the upper housing part contact 50.

As further shown in Fig. 5, in the illustrated preferred embodiment of a contact 50 on the L-shaped portion 64, 65 a curved tab 78 is provided which protrudes from the surface of the portion 64, 65 in the direction of the plane in which the spring 70 is provided. In the illustrated embodiment, the tab 78 preferably has an S-shaped profile and serves as a stop or limit for the base 73.

The entire contact 50 including spring 70 is inserted after assembly in the manner shown in Fig. 5 from the side into the housing 1 in the recesses provided therein, and that per intended pole.

The contact 50 and the spring 70 are made of metal or a conductive material, while the housing itself completely or at least partially made of plastic, d. H. made of insulating material.

The use of the contact arrangements preferably described in connection with FIG. 5 thus allows a direct connection of the outgoing lines immediately adjacent to the existing within the housing 1 fuse elements, so that in such fuse bars usual wiring or the installation of contact paths of the respective fuse holder up to a predetermined end face the bar omitted. In this way, the fuse strips can be made very narrow and compact at least in the upper region of the housing 1. The laterally molded, the outgoing contacts receiving terminal blocks 10, 11, 12 ensure a very good insulation and also prevent leakage currents between the individual, adjacent outgoing contacts due to the distancing of the individual terminal blocks 10, 11, 12 to each other in the longitudinal or axial direction of the bar. The height of the terminal blocks 10, 11, 12 is selected such that the inlet openings of the guides 18, 19, 20 are at a predetermined distance to the top of the housing 1 and thus outgoing lines can also be laid in parallel and in the axial direction to the housing top 1, without thereby the handling of the levers 2, 3, 4 is impaired by the outgoing lines in any way.

In a preferred embodiment, it is provided that the housing 1 consists of an upper housing part and a lower housing part, wherein the housing lower part of the designated in Fig. 2 1a section is meant, in which the individual contact arrangements can be introduced while the upper housing part, the plate 26 to understand is.

For mounting the contact arrangements, the lower housing part 1 a is rotated 90 ° with respect to FIG. 2 rearwardly placed on a mounting surface, after which the individual contact arrangements are introduced including the lever 2, 3, 4, before the plate or wall 26 is placed as the upper housing part and through the locking devices described 27, 31 are fixedly connected to the housing lower part 1a or mounted together in some other way.

In a further embodiment, the housing 1 is closed at the end by a cover 80.

FIG. 6 shows two two-pole fuse strips which have a structure substantially as described with reference to FIGS. 1 to 5. Identical parts are provided with the same reference numerals as in Figures 1 to 5.

According to FIG. 6, two two-pole fuse strips are firmly coupled together, wherein z. B. the connection can be provided by means of dovetail guide 89 or the like. In any case, the two bipolar fuse strips shown in Fig. 6 are of the same construction, d. H. it is a fuse strip 82 and a further fuse strip 83 is provided, which have mutually identical structure and which can be assembled in case of need to a four-pin fuse strip, in such a four-pin fuse strip, the pitch is equal to each, d. H. the distance between clamping foot 6 and clamping foot 7 corresponds to the distance between clamping foot 7 and clamping foot 8. Accordingly, the connection blocks for the outgoing contacts, not shown in FIG. 6, located on the opposite side are provided at the same distance from each other.

The main advantage of the fuse strip described in connection with FIG. 6 is thus that either two-pole or four-pole fuse strips can be assembled from identical elements and the connection of the outgoing lines can be made screwless by inserting the outgoing lines into the outgoing contacts of the terminal blocks. It can thus achieve a very fast installation of the entire fuse strips in conjunction with the associated switching devices.

Claims (15)

Securing strip with a housing (1), preferably made of plastic, with at least two receiving devices for securing elements (48) arranged in the housing (1),
with clamping feet (6, 7, 8) provided on the housing (1) for placing on busbars (38, 39),
in which in the region of each clamping foot (6, 7, 8) a contact (35, 36, 37) is provided for electrically contacting a busbar (38, 39),
characterized,
in that a terminal block (10, 11, 12) per pole is provided laterally of the housing (1),
that in each terminal block a outgoing contact (50, 70) is included for preferably screwless connection of outgoing lines, each outgoing contact (50, 70) via the respective fuse element (48) a circuit to the associated contact element (35, 36, 37) for contacting each forms a busbar. A fuse strip according to claim 1,
characterized,
in that each terminal block (10, 11, 12) has a guide (18, 19, 20) for introducing outgoing lines. A fuse strip according to claim 1 or 2,
characterized,
in that each connection block (10, 11, 12) has a further, preferably slot-shaped opening (22, 23, 50, 70, 24) for introducing a tool in the direction of the outgoing contact to release an outgoing line. A fuse strip according to one of the preceding claims,
characterized,
in that the guides (18, 19, 20) are formed essentially perpendicular to the longitudinal axis of the securing strip. A fuse strip according to one of the preceding claims,
characterized,
in that each outgoing contact (50, 70) has a contact (50) and a clamping spring (70), wherein the clamping spring (70) has a spring tongue (76) which is spring-biased against a contact section (68) of the contact (50). A fuse strip according to one of the preceding claims,
characterized,
in that each contact (50) has an extended contact section (64, 65) on which is formed a section (66) pointing away from the contact (50), which section has a contact tongue (68) for receiving the clamping spring (70). Safety strip according to claim 6,
characterized,
in that the clamping spring (70) is provided laterally offset relative to the contact (50). A fuse strip according to one of the preceding claims,
characterized,
in that the clamping spring (70) is a separate part from the contact (50) and has a leg (71) with a slot (72) such that within the slot (72) a contact spring tongue (76) of the clamping spring (70) is adjustably arranged and the slot (72) receives the contact tongue (68) of the contact (50). A fuse strip according to at least one of the preceding claims,
characterized,
that each contact (50) has two contact tongues (50a, 50a ') which are approximately parallel to one another and mirror-symmetrical to one another. Safety strip according to claim 9,
characterized,
in that the two contact tongues (50a, 50a ') are bordered by a substantially U-shaped spring clip (62). A fuse strip according to at least one of the preceding claims,
characterized,
in that the housing (1) has a housing lower part (1a) in which recesses (54, 55) for receiving the contacts (46, 50) are formed. A fuse strip according to at least one of the preceding claims,
characterized,
that it is formed with two poles and that connecting means (89) for receiving a further securing strip are formed at least on one end face. Securing strip according to at least one of the preceding claims
characterized,
in that the slots (22, 23, 24) are provided parallel to the guides (18, 19, 20) and are substantially aligned with a V-shaped leg portion (75) of the respective contact tongue (76). A fuse strip according to at least one of the preceding claims,
characterized,
that it has a number of pole sections corresponding to the pole number, in which a fuse holder, the incoming and outgoing contacts and the respective outgoing terminal is provided. A fuse strip according to claim 14,
characterized,
that each pole portion in the region of the associated terminal block (10, 11, 12) is fixed.

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